U.S. patent application number 16/066188 was filed with the patent office on 2021-07-01 for color film substrate, fabrication method thereof, and display device.
This patent application is currently assigned to BOE TECHNOLOGY GROUP CO., LTD.. The applicant listed for this patent is BOE TECHNOLOGY GROUP CO., LTD., Fuzhou BOE Optoelectronics Technology Co., Ltd.. Invention is credited to Hui Chen, Shijian Luo, Xinyu Zhang.
Application Number | 20210199862 16/066188 |
Document ID | / |
Family ID | 1000005508743 |
Filed Date | 2021-07-01 |
United States Patent
Application |
20210199862 |
Kind Code |
A1 |
Luo; Shijian ; et
al. |
July 1, 2021 |
COLOR FILM SUBSTRATE, FABRICATION METHOD THEREOF, AND DISPLAY
DEVICE
Abstract
A color film substrate includes a substrate, a light-shielding
matrix, and a functional composite layer. The light-shielding
matrix is over the substrate. The functional composite layer is
over the substrate and is electrically conductive. The functional
composite layer includes a composite material including a quantum
dot and a graphene and is configured to convert white light into
color light.
Inventors: |
Luo; Shijian; (Beijing,
CN) ; Chen; Hui; (Beijing, CN) ; Zhang;
Xinyu; (Beijing, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
BOE TECHNOLOGY GROUP CO., LTD.
Fuzhou BOE Optoelectronics Technology Co., Ltd. |
Beijing
Fuzhou, Fujian |
|
CN
CN |
|
|
Assignee: |
BOE TECHNOLOGY GROUP CO.,
LTD.
Beijing
CN
Fuzhou BOE Optoelectronics Technology Co., Ltd.
Fuzhou, Fujian
CN
|
Family ID: |
1000005508743 |
Appl. No.: |
16/066188 |
Filed: |
December 15, 2017 |
PCT Filed: |
December 15, 2017 |
PCT NO: |
PCT/CN2017/116514 |
371 Date: |
June 26, 2018 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
G02F 1/133617 20130101;
G02F 1/133516 20130101; G02F 1/133528 20130101; G02F 1/133512
20130101; G02B 5/206 20130101; G02F 2202/36 20130101 |
International
Class: |
G02B 5/20 20060101
G02B005/20; G02F 1/1335 20060101 G02F001/1335; G02F 1/13357
20060101 G02F001/13357 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 20, 2017 |
CN |
201710166415.X |
Claims
1. A color film substrate comprising: a substrate, and a functional
composite layer over the substrate and being electrically
conductive, wherein: the functional composite layer includes a
composite material including a quantum dot and a grapheme, and is
configured to convert white light into color light.
2. The color film substrate according to claim 1, wherein: a weight
percentage of the quantum dot in the composite material is in a
range from approximately 10% to approximately 20%, and a weight
percentage of the graphene in the composite material is in a range
from approximately 40% to approximately 65%.
3. The color film substrate according to claim 1, wherein: the
functional composite layer includes a plurality of color conductive
units having approximately equal thicknesses.
4. The color film substrate according to claim 3, wherein: the
plurality of color conductive units include a red conductive unit,
a green conductive unit, and a blue conductive unit.
5. The color film substrate according to claim 4, wherein: the red
conductive unit includes a red composite material, the green
conductive unit includes a green composite material, and the blue
conductive unit includes a blue composite material.
6. The color film substrate according to claim 3, wherein the
thicknesses of the color conductive units are in a range from
approximately 1.3 mm to approximately 2.3 mm.
7. The color film substrate according to claim 3, further
comprising: a light-shielding matrix arranged over the substrate,
wherein: the light-shielding matrix includes a plurality of open
regions arranged in an array, and one of the color conductive units
is in one of the open regions.
8. The color film substrate according to claim 1, further
comprising: a polarizer layer over the functional composite
layer.
9. The color film substrate according to claim 8, further
comprising: a photo spacer layer over the polarizer layer.
10. The color film substrate according to claim 1, wherein the
functional composite layer has a multilayer structure.
11. A method for fabricating a color film substrate, comprising:
providing a substrate; and forming a functional composite layer
over the substrate using a composite material including a quantum
dot and a graphene, the functional composite layer being
electrically conductive.
12. The method according to claim 11, wherein forming the
functional composite layer over the substrate includes: forming a
composite layer by a coating process.
13. The method according to claim 11, further comprising: forming a
light-shielding matrix over the substrate, the light-shielding
matrix including a plurality of open regions, wherein forming the
functional composite layer over the substrate includes forming a
plurality of color conductive units, one of the color conductive
units being formed in one of the open regions of the
light-shielding matrix.
14. The method of claim 13, wherein forming the functional
composite layer over the substrate includes: forming a red
conductive unit in a first one of the open regions of the
light-shielding matrix by a first coating process using a red
composite material including a red quantum dot; forming a green
conductive unit in a second one of the open regions of the
light-shielding matrix by a second coating process using a green
composite material including a green quantum dot; and forming a
blue conductive unit in a third one of the open regions of the
light-shielding matrix by a third coating process using a blue
composite material including a blue quantum dot.
15. The method according to claim 13, further comprising: forming a
polarizer layer over the functional composite layer.
16. The method according to claim 15, further comprising: forming a
photo spacer layer over the polarizer layer.
17. A display device, comprising the color film substrate according
to claim 1.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This PCT patent application claims priority to Chinese
Patent Application No. 201710166415.X, filed on Mar. 20, 2017, the
entire contents of which are incorporated herein by reference.
TECHNICAL FIELD
[0002] The present disclosure generally relates to the field of
display technologies and, more particularly, to a color film
substrate, a fabrication method thereof, and a display device.
BACKGROUND
[0003] A color film substrate in a conventional thin film
transistor liquid crystal display (TFT-LCD) includes a substrate,
and a light-shielding matrix, a color filter layer, a common
electrode, and a photo spacer (PS) layer successively formed over
the substrate. A color filter layer in the conventional TFT-LCD
includes a red (R) filter unit, a green (G) filter unit, and a blue
(B) filter unit. The light-shielding matrix has a plurality of open
regions, each of which includes a filter unit. A common electrode
can be formed over the color filter layer by a sputter process,
using indium tin oxide (ITO) as a material.
SUMMARY
[0004] In one aspect, the present disclosure provides a color film
substrate including a substrate, a light-shielding matrix, and a
functional composite layer. The functional composite layer is over
the substrate and is electrically conductive. The functional
composite layer includes a composite material including a quantum
dot and a graphene and is configured to convert white light into
color light.
[0005] In some embodiments, a weight percentage of the quantum dot
in the composite material is in a range from approximately 10% to
approximately 20%. A weight percentage of the graphene in the
composite material is in a range from approximately 40% to
approximately 65%.
[0006] In some embodiments, the functional composite layer includes
a plurality of color conductive units that have approximately equal
thicknesses.
[0007] In some embodiments, the plurality of color conductive units
include a red conductive unit, a green conductive unit, and a blue
conductive unit.
[0008] In some embodiments, the red conductive unit includes a red
composite material, the green conductive unit includes a green
composite material, and the blue conductive unit includes a blue
composite material.
[0009] In some embodiments, the thicknesses of the color conductive
units are in a range from approximately 1.5 mm to approximately 2.5
mm.
[0010] In some embodiments, a light-shielding matrix is arranged
over the substrate, the light-shielding matrix includes a plurality
of open regions that are arranged in an array. One of the color
conductive units is arranged in one of the open regions.
[0011] In some embodiments, the color film substrate further
includes a polarizer layer arranged over the functional composite
layer.
[0012] In some embodiments, the color film substrate further
includes a photo spacer layer arranged over the polarizer
layer.
[0013] In some embodiments, the functional composite layer has a
multilayer structure.
[0014] Another aspect of the present disclosure provides a method
for fabricating a color film substrate. The method includes
providing a substrate; and forming a functional composite layer
over the substrate using at least one composite material including
a quantum dot and a graphene. The functional composite layer is
electrically conductive.
[0015] In some embodiments, forming the functional composite layer
over the substrate includes forming a composite layer by a coating
process.
[0016] In some embodiments, the method further includes forming a
light-shielding matrix over the substrate. The light-shielding
matrix includes a plurality of open regions. Forming the functional
composite layer over the substrate includes forming a plurality of
color conductive units. One of the color conductive units is framed
in one of the open regions of the light-shielding matrix.
[0017] In some embodiments, forming the functional composite layer
over the substrate includes forming a red conductive unit in a
first one of the open regions of the light-shielding matrix by a
first coating process using a red composite material including a
red quantum dot; forming a green conductive unit in a second one of
the open regions of the light-shielding matrix by a second coating
process using a green composite material including a green quantum
dot; and forming a blue conductive unit in a third one of the open
regions of the light-shielding matrix by a third coating process
using a blue composite material including a blue quantum dot.
[0018] In some embodiments, the method further includes forming a
polarizer layer over the functional composite layer.
[0019] In some embodiments, the method further includes forming a
photo spacer layer over the polarizer layer.
[0020] Another aspect of the present disclosure provides a display
device including a color film substrate.
BRIEF DESCRIPTION OF THE FIGURES
[0021] The following drawings are merely examples for illustrative
purposes according to various disclosed embodiments and are not
intended to limit the scope of the present disclosure.
[0022] FIG. 1 illustrates a schematic view of a display device in
the conventional technologies.
[0023] FIG. 2 illustrates a schematic view of an exemplary color
film substrate according to various disclosed embodiments of the
present disclosure;
[0024] FIG. 3 illustrates another schematic view of an exemplary
color film substrate according to various disclosed embodiments of
the present disclosure;
[0025] FIG. 4 illustrates a flow chart of an exemplary fabrication
method for an exemplary color film substrate according to various
disclosed embodiments of the present disclosure;
[0026] FIG. 5 illustrates a schematic view of an exemplary
structure after a light-shielding matrix is formed over a substrate
according to various disclosed embodiments of the present
disclosure;
[0027] FIG. 6 illustrates a flow chart of an exemplary method of
forming an exemplary functional composite layer according to
various disclosed embodiments of the present disclosure;
[0028] FIG. 7 illustrates a schematic view of an exemplary
structure after a red conductive unit is formed over a substrate
over which a light-shielding matrix has been formed according to
various disclosed embodiments of the present disclosure;
[0029] FIG. 8 illustrates a schematic view of forming a red
conductive unit over a substrate over which a light-shielding
matrix has been formed according to various disclosed embodiments
of the present disclosure;
[0030] FIG. 9 illustrates a schematic view of an exemplary
structure after a green conductive unit is formed over a substrate
over which a red conductive unit has been formed according to
various disclosed embodiments of the present disclosure;
[0031] FIG. 10 illustrates a schematic view of forming a green
conductive unit over a substrate over which a red conductive unit
has been formed according to various disclosed embodiments of the
present disclosure;
[0032] FIG. 11 illustrates a schematic view of an exemplary
structure after a blue conductive unit is formed over a substrate
over which a green conductive unit has been formed according to
various disclosed embodiments of the present disclosure;
[0033] FIG. 12 illustrates a schematic view of forming a blue
conductive unit over a substrate over which a green conductive unit
has been formed according to various disclosed embodiments of the
present disclosure;
[0034] FIG. 13 illustrates a schematic view of an exemplary
structure after a polarizer layer is formed over a substrate over
which a functional composite layer has been formed according to
various disclosed embodiments of the present disclosure;
[0035] FIG. 14 illustrates a schematic view of an exemplary display
device according to various disclosed embodiments of the present
disclosure; and
[0036] FIG. 15 illustrates a schematic view showing an operation of
an exemplary display device according to various disclosed
embodiments of the present disclosure.
DETAILED DESCRIPTION
[0037] Exemplary embodiments of the disclosure will now be
described in more detail with reference to the drawings. It is to
be noted that, the following descriptions of some embodiments are
presented herein for purposes of illustration and description only,
and are not intended to be exhaustive or to limit the scope of the
present disclosure.
[0038] The aspects and features of the present disclosure can be
understood by those skilled in the art through the exemplary
embodiments of the present disclosure further described in detail
with reference to the accompanying drawings.
[0039] FIG. 1 illustrates a schematic view of a display device 8 in
the conventional technologies. As shown in FIG. 1, the display
device 8 includes an array substrate 81 and a color film substrate
82 paired to form a box, and a liquid crystal layer 83 between the
array substrate 81 and the color film substrate 82. The liquid
crystal layer 83 includes a plurality of liquid crystal molecules
831. A sealing frame 84 is provided between the array substrate 81
and the color film substrate 82. The liquid crystal molecules 831
are located in a space enclosed by the sealing frame 84.
[0040] As shown in FIG. 1, the array substrate 81 has one side
feeing away from the liquid crystal layer 83, and the side feeing
away from the liquid crystal layer 83 is attached with an upper
polarizer plate 85. The color film substrate 82 has one side facing
away from the liquid crystal layer 83, and the side feeing away
from the liquid crystal layer 83 is attached with a lower polarizer
plate 86. Generally, a polarization direction of the upper
polarizer plate 85 may be perpendicular to a polarization direction
of the lower polarizer plate 86, such that light can pass through
the display device 8. The display device 8 may use the upper
polarizer plate 85 and the lower polarizer plate 86, in conjunction
with liquid crystal molecules 831 in the liquid crystal layer 83,
to achieve image display.
[0041] As shown in FIG. 1, the color film substrate 82 includes a
substrate 821, and a light-shielding matrix 822, a color filter
layer 823, a common electrode 824, and a photo spacer layer 825
successively arranged over the substrate 821. The color filter
layer 823 includes a red filter unit 8231, a green filter unit
8232, and a blue filter unit 8233. The light-shielding matrix 822
includes a plurality of open regions, each of which is provided
with a fiber unit. The photo spacer layer 825 includes a plurality
of photo spacers 8251. The photo spacers 8251 can support the array
substrate 81 and the color film substrate 82, such that a space is
formed between the array substrate 81 and fee color film substrate
82. The liquid crystal molecules 831 are located in the space
formed wife a support of fee photo spacers 8251.
[0042] The array substrate 81 may include a substrate (not shown in
FIG. 1), and a gate electrode (not shown in FIG. 1), a gate
insulating layer (not shown in FIG. 1), an active layer (not shown
in FIG. 1), a source-drain electrode metal layer (not shown in FIG.
1), a passivation layer (not shown in FIG. 1), pixel electrodes
(not shown in FIG. 1), and other appropriate structures
successively arranged over the substrate.
[0043] In the color film substrate 82, the color filter layer 823
may generally be formed of a polymer color resist material.
Ingredients of the polymer color resist material may generally
include one or more of a resin, a multifunctional monomer, an
initiator, a raw material, a dispersant, a solvent, an additive,
etc. After the color filter layer 823 is formed, the common
electrode 824 may be formed over the color filter layer 823 by a
sputter process using indium tin oxide (ITO) as a material. A
height of each filter unit of the color filter layer 823 may be
non-uniform, resulting in a Red-Green-Blue (RGB) segment
difference. The RGB segment difference may result in poor
uniformity of a subsequently formed polyimide film, and may finis
result in mura. An over cover (OC) layer (not shown in FIG. 1) may
generally be formed over the color filter layer 823 to achieve a
smooth surface, and then the common electrode 824 may be formed
over the OC layer by a sputter process.
[0044] However, in the conventional technologies, if the color film
substrate 82 does not include an OC layer, because the color film
substrate 82 includes both the color filter layer 823 and the
common electrode 824, the color film substrate 82 may be relatively
thick, causing difficulties in realizing a thin and light-weight
display device. In addition, since a sputter process is used to
form the common electrode 824 over the color filter layer 823, the
sputter process may cause a certain damage to the color filter
layer 823. On the other hand, if the color film substrate 82
includes an OC layer, because the color film substrate 82 includes
the color filter layer 823, the OC layer, and the common electrode
824, the thickness of the color film substrate 02 may be increased.
Further, because of a material of the color filter layer 823, the
color film substrate 82 may have a relatively narrow color gamut
range, a relatively low color saturation, and a relatively poor
display performance.
[0045] FIG. 2 illustrates a schematic view of an exemplary color
film substrate 11 according to various disclosed embodiments of the
present disclosure. As shown in FIG. 2, the exemplary color film
substrate 11 includes a substrate 111 and a functional composite
layer 112 disposed over the substrate 111. The functional composite
layer 112 can be electrically conductive and can convert white
light into color light. The color film substrate can also be
referred to as a color filter substrate.
[0046] The functional composite layer 112 may be formed of at least
one composite material. The composite material may include a
quantum dot and a graphene.
[0047] The present disclosure provides a color film substrate. The
color film substrate of the disclosure may include a functional
composite layer which is electrically conductive and capable of
converting white light into color light. Thus, the functional
composite layer may serve as a color filter layer and a common
electrode. That is, the function of the color filter layer and the
function of the common electrode can be realized simultaneously by
the functional composite layer. Accordingly, the color film
substrate of the disclosure may have a relatively small number of
layers, as compared to the conventional technologies in which a
color film substrate may have a relatively large thickness and a
thin and light-weight device may be difficult to achieve. The color
film substrate of the disclosure may have a relatively small
thickness, facilitating the realization of a thin and light-weight
display device.
[0048] The substrate 111 may be a transparent substrate, and may
be, for example, a substrate formed of a transparent non-metal
material having a certain strength, such as a glass, a quartz, a
transparent resin, or the like.
[0049] In the present disclosure, the functional composite layer
112 may be formed of at least one composite material. Ingredients
of the composite material may include one or more of a quantum dot,
a graphene, an adhesive, a curing agent, an accelerant, a diluent,
etc. The quantum dot may have a size between approximately 1 nm and
approximately 10 nm. Due to electron and hole quantum confinement,
a quantum confinement effect may exist. Accordingly, a continuous
band structure may turn into a structure with discrete energy
levels like molecules. Thus, an excited emission peak of the
quantum dot may be narrow, and a spectrum intensity of the quantum
dot may be high. In embodiments of the present disclosure, the
quantum dot may be mainly used for converting white light into
color light, and a weight percentage of the quantum dot in the
composite material may range from approximately 10% to
approximately 20%. If the weight percentage of the quantum dot in
the composite material is less than approximately 10%, a relative
amount of the quantum dot may be relatively small, and a luminous
efficiency of the quantum dot may be affected. If the weight
percentage of the quantum dot in the composite material is greater
than approximately 20%, a thermodynamic chemical agglomeration
reaction among quantum dots may occur due to the small particle
sizes of the quantum dots, causing the quantum dots to agglomerate.
As a result, light transmittance may be reduced, and a luminous
efficiency of the quantum dot may be affected.
[0050] The graphene may be mainly used for conducting electricity.
A weight percentage of the graphene may range from approximately
40% to approximately 65%. In the composite material, if the weight
percentage of the graphene is greater than approximately 65%, a
relative amount of the quantum dot may be relatively small, and the
luminous efficiency of the quantum dot may be affected. If the
weight percentage of the graphene in the composite material is less
than approximately 40%, a conductivity of the conductive layer may
be affected, which may affect a voltage between a pixel electrode
and the conductive layer, and hence affect a twisting performance
of the liquid crystal. The adhesive may cause the composite
material to have a certain viscosity and a certain degree of
adhesion. The adhesive may include epoxy resin, e.g., bisphenol
A-type epoxy resin. A weight percentage of the adhesive may range
from approximately 20% to approximately 40%. The curing agent can
make the quantum dots cured mi a surface of graphene layers. The
curing agent may include dicyandiamide, p-phenylenediamine, or
another suitable material. A weight percentage of the curing agent
may range from approximately 1% to approximately 10%. The
accelerant may serve as an additive, and may include imidazole,
dimethylimidazole, triethylamine, or another appropriate material.
A weight percentage of the accelerant may range from approximately
0.3% to approximately 8%. The diluent may serve as an additive, and
may include at least one of isopropanol, acetone, or n-butanol. A
weight percentage of the diluent may range from approximately 3% to
approximately 10%. The above descriptions of the composite material
are merely for illustrative and exemplary purposes. The composite
material may include other ingredients, and the weight percentages
of the ingredients may be selected in different ranges according to
various application scenarios, which are not limited in the present
disclosure.
[0051] FIG. 3 illustrates another schematic view of the exemplary
color film substrate 11 according to various disclosed embodiments
of the present disclosure. As shown in FIG. 3, the functional
composite layer 112 includes a plurality of color conductive units.
As used in this disclosure, unless otherwise specified, the term
"conductive" refers to "electrically conductive." The plurality of
color conductive units include a red conductive unit 1121, a green
conductive unit 1122, and a blue conductive unit 1123, all of which
may have equal thicknesses. In some embodiments, the thicknesses of
the color conductive units may range from approximately 1.5 mm to
approximately 2.5 mm. The equal thicknesses of the color conductive
units may prevent mura caused by segment differences between
different color conductive units from occurring. In some
embodiments, the functional composite layer 112 may be formed by a
coating process, an ink-jet printing process, a transfer process, a
drop casting process, or another appropriate process. Accordingly,
a conductive unit of each color may be formed by a coating process,
an ink-jet printing process, a transfer process, a drop casting
process, or another appropriate process. In some embodiments, a
forming material of the red conductive unit 1121 may include a red
composite material, a forming material of the green conductive unit
1122 may include a green composite material, and a forming material
of the blue conductive unit 1123 may include a blue composite
material. A quantum dot in the red composite material may include a
red quantum dot, which may mainly include, for example, a II-VI
quantum dot, the red quantum dot is used for emitting red light
under the excitation of blue light. A quantum dot in the green
composite material may include a green quantum dot, which may
mainly include, for example, a I-III-VI quantum dot. A quantum dot
in the blue composite material may include a blue quantum dot,
which may mainly include, for example, a rare-earth quantum dot,
the green quantum dot is used for emitting green light under the
excitation of blue light. Reference can be made to the above
descriptions about the composite material, for ingredients of the
red composite material, the green composite material, and the blue
composite material, and for functions and weight percentages of the
ingredients, which are not repeated here.
[0052] In some embodiments, the functional composite layer 112 may
have a multilayer structure (not shown in FIG. 3). Accordingly,
each color conductive unit may have a multilayer structure. That
is, each color conductive unit may include a plurality of
sublayers. In some embodiments, each sublayer may be formed by a
coating process, an ink-jet printing process, a transfer process, a
drop casting process, or anther appropriate process. In practical
applications, a color conductive unit may fall off, causing a
corresponding sub-pixel to fail, and resulting in a poor display
performance of the color film substrate. In embodiments of the
present disclosure, because the color conductive unit may have a
multilayer structure, if one sublayer in the color conductive unit
falls off, other sublayers may still function properly. As a
result, the display performance of the color film substrate may be
better.
[0053] Further, as shown in FIG. 3, the color film substrate 11
includes a light-shielding matrix 113 disposed over the substrate
111. The light-shielding matrix 113 includes a plurality of open
regions (not marked in FIG. 3), and each open region is provided
with one of the color conductive units of the functional composite
layer 112. The open regions may be arranged in an array.
[0054] Further, as shown in FIG. 3, the color film substrate 11
includes a polarizer layer 114 disposed over the functional
composite layer 112. In some embodiments, the polarizing layer 114
may, for example, include a polarizer plate, which may be attached
to the functional composite layer 112. In some embodiments, the
functional composite layer 112 may be formed of at least one
composite material. A surface of the composite material may include
one or more of a hydroxyl group (--OH), a carboxyl group (--COOH),
and other appropriate functional groups. The hydroxyl group (--OH),
the carboxyl group (--COOH), or the other appropriate functional
group may cause the composite material to be hydrophilic to a
certain degree. A material of the polarizer plate may have a
certain water solubility. Thus, the hydroxyl group (--OH), the
carboxyl group (--COOH), or the other appropriate functional group
may attach the polarizer plate to the functional composite layer
112. The manner of disposing the polarizer plate over the
functional composite layer 112 is not restricted in the present
disclosure, and may be selected according to various application
scenarios.
[0055] Further, as shown in FIG. 3, the color film substrate 11
includes a photo spacer layer 115 disposed over the polarizer layer
114. The photo spacer layer 115 includes a plurality of photo
spacers 1151. The photo spacers 1151 may each have a columnar
structure, e.g., a cylindrical structure, a circular table
structure, a prismatic structure, or the like. In some embodiments,
as shown in FIG. 3, the photo spacer 1151 has a trapezoidal
vertical cross section. The photo spacers 1151 may be similar to
the photo spacers 8251 shown in FIG. 1, and thus detailed
description thereof is omitted.
[0056] The present disclosure provides a color film substrate. The
color film substrate of the disclosure may include a functional
composite layer which is electrically conductive and capable of
converting white light into color light. Thus, the functional
composite layer may serve as a color filter layer and a common
electrode. That is, the function of the color filter layer and the
function of the common electrode can be realized by the functional
composite layer. Accordingly, the color film substrate of the
disclosure may have a relatively small number of layers, as
compared to the conventional technologies in which a color film
substrate may have a relatively large thickness and a thin and
light-weight device may be difficult to achieve. The color film
substrate of the disclosure may have a relatively small thickness,
facilitating the realization of a thin and light-weight display
device.
[0057] Further, in the color film substrate of the disclosure, the
function of a color filter layer may be realized by using a quantum
dot. The quantum dot may include, for example, at least one of a
red quantum dot, a green quantum dot, a blue quantum dot, or
another appropriate quantum dot. The quantum dot may have a high
spectrum intensity and a wide color gamut range. Thus, the color
film substrate may have a relatively wide color gamut range, a
relatively high color saturation, a relatively high color contrast,
and a relatively good display performance. Further, in the color
film substrate of the disclosure, the function of the common
electrode may be realized by using a graphene, with no need to
further provide a common electrode. Accordingly, a dependence on a
sputter target may be suppressed, a production cost may be reduced,
and a damage to fire color film substrate, caused by a sputter
process for forming fire common electrode, may be reduced.
[0058] A fabrication method and fabrication principles for the
color film substrate of the present disclosure are described below
with reference to the drawings.
[0059] The present disclosure provides a fabrication method for a
color film substrate. The fabrication method can be used to
fabricate, for example, the color film substrate shown in FIG. 2 or
FIG. 3. The fabrication method may include the following.
[0060] At least one composite material may be used to form a
functional composite layer over a substrate. The functional
composite layer can be electrically conductive and can convert
white light into color light. The composite material may include a
quantum dot and a graphene. The quantum dot may include, for
example, at least one of a red quantum dot. green quantum dot, a
blue quantum dot, or another appropriate quantum dot.
[0061] In some embodiments, after forming the functional composite
layer over the substrate using the composite material, the method
may further include forming a polarizer layer over the substrate
over which the functional composite layer has been formed.
[0062] In some embodiments, before forming the functional composite
layer over the substrate using the at least one composite material,
the method may include forming a light-shielding matrix over the
substrate, where the light-shielding matrix may include a plurality
of open regions.
[0063] Forming the functional composite layer over the substrate by
using the at least one composite material may include forming the
functional composite layer using the at least one composite
material, over the substrate over which the light-shielding matrix
has been formed, where the functional composite layer may include a
plurality of color conductive units, each of which may be located
in an open region of the light-shielding matrix.
[0064] In some embodiments, after forming the polarizer layer over
the substrate over which the functional composite layer has been
formed, the method may further include forming a photo spacer layer
over the substrate over which the polarizer layer has been
formed.
[0065] In some embodiments, the plurality of color conductive units
may include a red conductive unit, a green conductive unit and a
blue conductive unit. The at least one composite material may
include a red composite material, a green composite material and a
blue composite material. Forming the functional composite layer
using the at least one composite material, over the substrate over
which the light-shielding matrix has been formed, may include:
forming the red conductive unit by a coating process and by using
the red composite material, over the substrate over which the
light-shielding matrix have been formed; forming the green
conductive unit by a coating process and by using the green
composite material, over the substrate over which the red
conductive unit has been formed; forming the blue conductive unit
by a coating process and by using the blue composite material, over
the substrate over which the green conductive unit has been formed,
and thus to form the functional composite layer.
[0066] In some embodiments, the red composite material may include
a red quantum dot, the green composite material may include a green
quantum dot, and the blue composite material may include a blue
quantum dot.
[0067] Any of the above-described technical solutions may form
embodiments of the present disclosure by any combination, which is
not described further here.
[0068] The present disclosure provides a fabrication method for a
color film substrate. The color film substrate may include a
functional composite layer which is electrically conductive and
capable of converting white light into color light. Thus, the
functional composite layer may serve as a color filter layer and a
common electrode. That is, the function of the color filter layer
and the function of the common electrode can be realized by the
functional composite layer. Accordingly, the color film substrate
fabricated by the disclosed fabrication method may have a
relatively small number of layers, as compared to the conventional
technologies in which a color film substrate may have a relatively
large thickness and it may be hard to achieve a thin and
light-weight device. The color film substrate fabricated by the
disclosed fabrication method may have a relatively small thickness,
facilitating the realization of a thin and light-weight display
device.
[0069] FIG. 4 illustrates a flow chart of an exemplary fabrication
method for an exemplary color film substrate according to various
disclosed embodiments of the present disclosure. The fabrication
method can be used for fabricating, for example, the color film
substrate 11 as shown in FIG. 2 or FIG. 3. The fabrication method
is described below with reference to FIG. 4.
[0070] At 401, a light-shielding matrix is formed over a substrate.
The light-shielding matrix includes a plurality of open
regions.
[0071] FIG. 5 illustrates a schematic view of an exemplary
structure after the light-shielding matrix 113 is formed over a
substrate 111 according to various disclosed embodiments of the
present disclosure. The substrate 111 may be a transparent
substrate, and may be, for example, a substrate formed of a
transparent non-metal material having a certain strength, such as a
glass, a quartz, a transparent resin, or the like. The
light-shielding matrix 113 includes a plurality of open regions A.
In some embodiments, the light-shielding matrix 113 may be formed
of a black resin material. A thickness of the light-shielding
matrix 113 may be selected according to various application
scenarios, which is not limited in the present disclosure.
[0072] In some embodiments, a layer of black resin material may be
coated over the substrate 111 to form a black resin layer, and then
the black resin layer may be processed by a patterning process to
form the light-shielding matrix 113. The patterning process may
include photoresist (PR) coating, exposure, development, etching,
and photoresist peeling. Thus, processing the black resin layer by
the patterning process to form the light-shielding matrix 113 may
include: coating a layer of photoresist having a certain thickness
over the black resin layer to form a photoresist layer; exposing
the photoresist layer by using a mask plate, such that fully
exposed regions and non-exposed regions are formed in the
photoresist layer, using a development process to remove
photoresist in the fully exposed regions of the photoresist layer
and to retain photoresist in the non-exposed regions of the
photoresist layer, etching regions of the black resin layer
corresponding to the fully exposed regions by an etching process;
forming the light-shielding matrix 113 after peeling off the
photoresist in the non-exposed regions. In some embodiments, the
regions of the black resin layer corresponding to the fully exposed
regions may be etched by a dry etching method. The manner of
etching the regions of the black resin layer corresponding to the
fully exposed regions is not restricted in the present disclosure,
and may be selected according to various application scenarios.
[0073] In embodiments of the present disclosure, descriptions are
made for scenarios that a positive photoresist is adopted to form
the light-shielding matrix 113, as examples, hi some other
embodiments, a negative photoresist may be adopted to form the
light-shielding matrix 113. Whether a positive photoresist or a
negative photoresist is selected to form the light-shielding matrix
113 is not restricted in the present disclosure.
[0074] At 402, a functional composite layer is formed using at
least one composite material, over the substrate over which the
light-shielding matrix has been formed. The functional composite
layer includes a plurality of color conductive units. Each color
conductive unit is located in one of the open regions A.
[0075] As shown in FIG. 3, the functional composite layer 112
includes a plurality of color conductive units. The plurality of
color conductive units include a red conductive unit 1121, a green
conductive unit 1122, and a blue conductive unit 1123. Thus, when
the functional composite layer 112 is formed, the red conductive
unit 1121, the green conductive unit 1122, and the blue conductive
unit 1123 may be formed, respectively. The functional composite
layer 112 may be formed of at least one composite material
including a quantum dot and a graphene. The quantum dot may
include, for example, at least one of a red quantum dot, a green
quantum dot, a blue quantum dot, or another appropriate quantum
dot. The graphene can be electrically conductive, and the quantum
dot can convert white light into color light. Thus, the functional
composite layer 112 can be electrically conductive and can convert
white light into color light.
[0076] FIG. 6 illustrates a flow chart of an exemplary method of
forming an exemplary functional composite layer over a substrate
over which an exemplary light-shielding matrix has been formed
according to various disclosed embodiments of the present
disclosure.
[0077] Referring to FIG. 6, at 4021, a red conductive unit is
framed by a coating process and by using a red composite material
over a substrate over which a light-shielding matrix has been
formed.
[0078] In some embodiments, the functional composite layer 112 may
have a multilayer structure, and thus, the red conductive unit 1121
may have a multilayer structure. FIG. 7 illustrates a schematic
view of an exemplary structure after the red conductive unit 1121
is formed over the substrate 111 over which the light-shielding
matrix 113 has been formed according to various disclosed
embodiments of the present disclosure. As shown in FIG. 7, the red
conductive unit 1121 is located in one of the open regions (not
marked in FIG. 7) of the light-shielding matrix 113. In some
embodiments, the red conductive unit 1121 may have a multilayer
structure (not shown in FIG. 7). In some embodiments, the red
conductive unit 1121 may be formed by a multiple coating process
and by using a red composite material, over the substrate 111 on
which the light-shielding matrix 113 has been formed. For example,
if the red conductive unit 1121 includes three sublayers, the red
conductive unit 1121 may be formed by performing a coating process
for three times, over the substrate 111 over which the
light-shielding matrix 113 has been formed. One sublayer of the red
conductive unit 1121 may be formed by performing the coating
process for one time.
[0079] Ingredients of the red composite material may include one or
more of a red quantum dot, a graphene, an adhesive, a curing agent,
an accelerant, a diluent, etc. The red quantum dot may include a
II-VI quantum dot. The red quantum dot may be used for converting
white light into red light, and a weight percentage of the red
quantum dot may range from approximately 10% to approximately 20%.
The graphene may be used for conducting electricity. A weight
percentage of the graphene may range from approximately 40% to
approximately 65%. The adhesive may cause the red composite
material to have a certain viscosity and a certain degree of
adhesion. The adhesive may include epoxy resin, e.g., bisphenol
A-type epoxy resin. A weight percentage of the adhesive may range
from approximately 20% to approximately 40%. The curing agent can
make the quantum dot cured on a surface of graphene layers. The
curing agent may include dicyandiamide, p-phenylenediamine, or
another suitable material. A weight percentage of the curing agent
may range from approximately 1% to approximately 10%. An accelerant
may serve as an additive, and may include imidazole,
dimethylimidazole, triethylamine, or another appropriate material.
A weight percentage of the accelerant may range from approximately
0.3% to approximately 8%. The diluent may serve as an additive, and
may include at least one of isopropanol, acetone, or n-butanol. A
weight percentage of the diluent may range from approximately 3% to
approximately 10%. The above descriptions of the red composite
material are merely for illustrative and exemplary purposes. The
red composite material may also include other ingredients, and the
weight percentages of the ingredients may be selected in different
ranges according to various application scenarios, which are not
limited in the present disclosure.
[0080] In some embodiments, using a red composite material, the red
conductive unit 1121 may be formed by a first mask plate and a
coating process. The first mask plate may include a
light-transmissive region and a light-blocking region. FIG. 8
illustrates a schematic view of forming a red conductive unit over
a substrate over which a light-shielding matrix has been formed
according to various disclosed embodiments of the present
disclosure. In some embodiments, as shown in FIG. 8, the first mask
plate 21 is disposed over the light-shielding matrix 113, such that
light-transmissive regions (not marked in FIG. 8) of the first mask
plate 21 are aligned with regions of red conductive units 1121 to
be formed, and the light-blocking regions (not marked in FIG. 8) of
the first mask plate 21 block regions other than the regions of red
conductive units 1121 to be formed. Further, a plurality of red
composite material layers may be coated over the substrate 111 over
which the light-shielding matrix 113 has been framed, through the
first mask plate 21. Further, the first mask plate 21 may be
removed and the red conductive unit 1121 may be obtained. A
schematic view of an exemplary structure after the first mask plate
21 is removed can be referred to FIG. 7.
[0081] At 4022, a green conductive unit is formed by a coating
process and by using a green composite material, over the substrate
over which the red conductive unit has been formed.
[0082] In some embodiments, the functional composite layer 112 may
have a multilayer structure, and thus, the green conductive unit
1122 may have a multilayer structure. FIG. 9 illustrates a
schematic view of an exemplary structure after the green conductive
unit 1122 is formed over the substrate 111 over which the red
conductive unit 1121 has been formed according to various disclosed
embodiments of the present disclosure. Referring to FIG. 9, the
green conductive unit 1122 is located in an open region (not marked
in FIG. 9) of the light-shielding matrix 113, and the green
conductive unit 1122 may have a multilayer structure (not shown in
FIG. 9). In some embodiments, the green conductive unit 1122 may be
formed by a multiple coating process and by using a green composite
material, over the substrate 111 over which the red conductive unit
1121 has been formed. For example, if the green conductive unit
1122 includes three sublayers, the green conductive unit 1122 may
be formed by performing a coating process for three times, over the
substrate 111 over which the red conductive unit 1121 has been
formed. One sublayer of the green conductive unit 1122 may be
formed by performing the coating process for one time.
[0083] Ingredients of the green composite material may include one
or more of a green quantum dot, a graphene, an adhesive, a curing
agent, an accelerant, a diluent, etc. The green quantum dot may
include a I-III-VI quantum dot. The green quantum dot may be used
for converting white light into green light, and a weight
percentage of the green quantum dot may range from approximately
10% to approximately 20%. The graphene may be used for conducting
electricity. A weight percentage of the graphene may range from
approximately 40% to approximately 65%. The adhesive may cause the
green composite material to have a certain viscosity and a certain
degree of adhesion. The adhesive may include epoxy resin, e.g.,
bisphenol A-type epoxy resin. A weight percentage of the adhesive
may range from approximately 20% to approximately 40%. The curing
agent can make the quantum dot cured on a surface of graphene
layers. The curing agent may include dicyandiamide,
p-phenylenediamine, or another suitable material. A weight
percentage of the curing agent may range from approximately 1% to
approximately 10%. The accelerant may serve as an additive, and may
include imidazole, dimethylimidazole, triethylamine, or another
appropriate material. A weight percentage of the accelerant may
range from approximately 0.3% to approximately 8%. The diluent may
serve as an additive, and may include at least one of isopropanol,
acetone, or n-butanol. A weight percentage of the diluent may range
from approximately 3% to approximately 10%. The above descriptions
of the green composite material are merely for illustrative and
exemplary purposes. The green composite material may further
include other ingredients, and the weight percentages of the
ingredients may be selected in different ranges according to
various application scenarios, which are not limited in the present
disclosure.
[0084] In some embodiments, using a green composite material, the
green conductive unit 1122 may be formed by a second mask plate and
a coating process. The second mask plate may include
light-transmissive regions and light-block regions. FIG. 10
illustrates a schematic view of forming a green conductive unit
over a substrate over which a red conductive unit has been formed
according to various disclosed embodiments of the present
disclosure. In some embodiments, as shown in FIG. 10, the second
mask plate 22 is disposed over the light-shielding matrix 113, such
that the light-transmissive regions (nor marked in FIG. 10) of the
second mask plate 22 are aligned with regions of green conductive
units 1122 to be framed, and the light-blocking regions (not marked
in FIG. 10) of the second mask plate 22 block regions other than
the regions of green conductive units 1122 to be formed. Further, a
plurality of green composite material layers may be coated over the
substrate 111 over which the red conductive unit 1121 has been
formed, through the second mask plate 22. Further, the second mask
plate 22 may be removed and the green conductive unit 1122 may be
obtained. A schematic view of an exemplary structure after the
second mask plate 22 is removed is shown in FIG. 9.
[0085] At 4023, a blue conductive unit is formed by a coating
process and by using a blue composite material, over the substrate
over which the green conductive unit has been formed, and a
functional composite layer is obtained.
[0086] In some embodiments, the functional composite layer 112 may
have a multilayer structure, and thus, the blue conductive unit
1123 may have a multilayer structure. FIG. 11 illustrates a
schematic view of an exemplary structure after the blue conductive
unit 1123 formed over the substrate 111 over which the green
conductive unit 1122 has been formed according to various disclosed
embodiments of the present disclosure. Referring to FIG. 11, the
blue conductive unit 1123 is located in an open region (not marked
in FIG. 11) of the light-shielding matrix 113, and the blue
conductive unit 1123 may have a multilayer structure (not shown in
FIG. 11). In some embodiments, the blue conductive unit 1123 may be
formed by a multiple coating process and by using a blue composite
material, over the substrate 111 over which the green conductive
unit 1122 has been framed. For example, if the blue conductive unit
1123 includes three sublayers, the blue conductive unit 1123 may be
formed by performing a coating process for three times, over the
substrate 111 over which the green conductive unit 1122 has formed.
One sublayer of the blue conductive unit 1123 may be formed by
performing the coating process for one time.
[0087] Ingredients of the blue composite material may include one
or more of a blue quantum dot, a graphene, an adhesive, a curing
agent, an accelerant, a diluent, etc. The blue quantum dot may
include a rare-earth quantum dot. The blue quantum dot may be used
for converting white light into blue light, and a weight percentage
of the blue quantum dot may range from approximately 10% to
approximately 20%. The graphene may be used for conducting
electricity. A weight percentage of the graphene may range from
approximately 40% to approximately 65%. The adhesive may cause the
blue composite material to have a certain viscosity and a certain
degree of adhesion. The adhesive may include epoxy resin, e.g.,
bisphenol A-type epoxy resin. A weight percentage of the adhesive
may range from approximately 20% to approximately 40%. The curing
agent can make the quantum dot cured on a surface of graphene
layers. The curing agent may include dicyandiamide,
p-phenylenediamine, or another suitable material. A weight
percentage of the curing agent may range from approximately 1% to
approximately 10%. The accelerant may serve as an additive, and may
include imidazole, dimethylimidazole, triethylamine, or another
appropriate material. A weight percentage of the accelerant may
range from approximately 0.3% to approximately 8%. A diluent may
serve as an additive, and may include at least one of isopropanol,
acetone, or n-butanol. A weight percentage of the diluent may range
from approximately 3% to approximately 10%. The above descriptions
of the blue composite material are merely for illustrative and
exemplary purposes. The blue composite material may further include
other ingredients, and the weight percentages of the ingredients
may be selected in different ranges according to various
application scenarios, which are not limited in the present
disclosure.
[0088] In some embodiments, using a blue composite material, the
blue conductive unit 1123 may be formed by a third mask plate and a
coating process. The third mask plate may include
light-transmissive regions and light-blocking regions. FIG. 12
illustrates a schematic view of forming a blue conductive unit over
a substrate over which a green conductive unit has been formed
according to various disclosed embodiments of the present
disclosure. In some embodiments, as shown in FIG. 12, the third
mask plate 23 is disposed over the light-shielding matrix 113, such
that light-transmissive regions (not marked in FIG. 12) of the
third mask plate 23 are aligned with regions of blue conductive
units 1123 to be formed, and the light-blocking regions (not marked
in FIG. 12) of the third mask plate 23 block regions other than the
regions of blue conductive units 1123 to be formed. Further, a
plurality of blue composite material layers may be coated over the
substrate 111 over which the green conductive unit 1122 has been
formed, through the third mask plate 23. Further, the third mask
plate 23 may be removed, and the blue conductive unit 1123 may be
obtained. A schematic view of an exemplary structure after the
third mask plate 23 is removed is shown in FIG. 11.
[0089] After the red conductive unit 1121, the green conductive
unit 1122, and the blue conductive unit 1123 are framed, the
functional composite layer 112 can be obtained. In embodiments of
the present disclosure, when the functional composite layer 112 is
formed descriptions are made for scenarios that the red conductive
unit 1121 is formed first, and then the green conductive unit 1122
is framed and finally the blue conductive unit 1123 is formed, as
examples. In some other embodiments, the order for formation of the
red conductive unit 1121, the green conductive unit 1122, and the
blue conductive unit 1123 can be adjusted. That is, the order of
processes 4021-4023 can be adjusted. It should be appreciated that
variations may be made to the embodiments described for the
processes 4021-4023 by persons skilled in the art, all of which are
within the scope of the present disclosure.
[0090] In embodiments of the present disclosure, descriptions are
made for scenarios that the functional composite layer 112 is
formed by a coating process, as examples, hi some other
embodiments, the functional composite layer 112 may be formed by an
ink-jet printing process, a transfer process, a drop casting
process, or another appropriate process, which is not restricted in
the present disclosure.
[0091] Referring again to FIG. 4, at 403, a polarizer layer is
formed over the substrate over which the functional composite layer
has been formed.
[0092] As an example, FIG. 13 illustrates a schematic view of an
exemplary structure after the polarizer layer 114 is formed over
the substrate 111 over which the functional composite layer 112 has
been formed according to various disclosed embodiments of the
present disclosure. The polarizer layer 114 can be, for example, a
polarizer plate. In some embodiments, the polarizer plate may be
attached to the functional composite layer 112 by an attaching
process to serve as the polarizer layer 114. In some other
embodiments, the polarizer plate may be fabricated over the
functional composite layer 112 by a polarizer plate fabrication
process, to serve as the polarizer layer 114. The manner of
preparing the polarizer layer is not restricted, and may be
selected according to various application scenarios. In some
embodiments, the functional composite layer 112 may be formed of at
least one composite material. A surface of the composite material
may include a hydroxyl group, a carboxyl group, and other
appropriate functional groups. A hydroxyl group, a carboxyl group,
or another appropriate functional group may make the composite
material hydrophilic to some degree. A material of the polarizer
plate may have has a certain water solubility. Thus, a hydroxyl
group, a carboxyl group, or another appropriate functional group
may attach the polarizer plate to the functional composite layer
112.
[0093] At 404, a photo spacer layer is framed over the substrate
over which the polarizer layer has been formed.
[0094] Reference can be made to FIG. 3 for a schematic view of a
structure after the photo spacer layer 115 is formed over the
substrate 111 over which the polarizer layer 114 has been formed.
As shown in FIG. 3, the photo spacer layer 115 includes a plurality
of photo spacers 1151. A photo spacer may have a columnar
structure, e.g., a cylindrical structure, a circular table
structure, a prismatic structure, or the like. In some embodiments,
as shown in FIG. 3, the photo spacer 1151 has a trapezoidal
vertical cross section. In some embodiments, the photo spacer layer
115 may be formed by using an organic resin material.
[0095] In some embodiments, an layer of organic resin material may
be deposited to form an organic resin film, by coating, magnetron
sputter, thermal evaporation, plasma enhanced chemical vapor
deposition (PECVD), or another appropriate method, over the
substrate 111 over which the polarizer layer 114 has been formed.
Then, the organic resin film may be exposed with a mask plate to
form fully exposed regions and non-exposed regions of the organic
resin film. A development process may be applied to remove organic
resin film in the fully exposed regions and to retain organic resin
film in the non-exposed regions, and thus to form the photo spacers
1151 in the non-exposed regions. Accordingly, the photo spacer
layer 115 may be obtained.
[0096] The present disclosure provides a fabrication method for a
color film substrate. The color film substrate may include a
functional composite layer which is electrically conductive and
capable of converting white light into color light. Thus, the
functional composite layer may serve as a color filter layer and a
common electrode. That is, the function of the color filter layer
and the function of the common electrode can be realized by the
functional composite layer. Accordingly, the color film substrate
fabricated by the fabrication method of the disclosure may have a
relatively small number of layers, as compared to the conventional
technologies, in which a color film substrate may have a relatively
large thickness and a thin and light-weight device may be difficult
to achieve. The color film substrate fabricated by the fabrication
method of the disclosure may have a relatively small thickness,
facilitating the realization of a thin and light-weight display
device.
[0097] Further, in the color film substrate fabricated by the
fabrication method of the disclosure, the function of the color
filter layer may be realized by using a quantum dot. The quantum
dot may include, for example, at least one of a red quantum dot, a
green quantum dot, a blue quantum dot, or another appropriate
quantum dot. The quantum dot may have a high spectrum intensity and
a wide color gamut range. Thus, the color film substrate may have a
relatively wide color gamut range and a relatively high color
saturation. Further, in the color film substrate fabricated by the
fabrication method of the disclosure, the function of the common
electrode may be realized by using a graphene, with no need to
further form a common electrode. A damage to the color filter
layer, caused by the process of forming the common electrode is
formed, may be suppressed. Accordingly, fabrication processes may
be reduced, and production costs may be reduced.
[0098] FIG. 14 illustrates a schematic view of an exemplary display
device 1 according to various disclosed embodiments of the present
disclosure. The exemplary display device 1 can be, for exemplary, a
twisted-nematic type display device. As shown in FIG. 14, the
exemplary display device 1 includes the color film substrate 11 and
an array substrate 12 paired to form a box, and a liquid crystal
layer 13 between the color film substrate 11 and the array
substrate 12. The liquid crystal layer 13 includes a plurality of
liquid crystal molecules 131. The color film substrate 11 may be,
for example, the color film substrate shown in FIG. 2 or FIG. 3. A
sealing frame 15 is provided between the color film substrate 11
and the array substrate 12, and the liquid crystal molecules 131
are located in a space enclosed by the sealing frame 15.
[0099] As shown in FIG. 14, the color film substrate 11 includes
the substrate 111, and the light-shielding matrix 113, the
functional composite layer 112, the polarizer layer 114, and the
photo spacer layer 115 successively formed over the substrate 111.
The light-shielding matrix 113 includes a plurality of open
regions. The functional composite layer 112 includes a plurality of
color conductive units. The plurality of color conductive units
include the red conductive unit 1121, the green conductive unit
1122, and the blue conductive unit 1123. Each open region of the
light-shielding matrix 113 is provide with a color conductive unit.
The photo spacer layer 115 includes the plurality of photo spacers
1151 which can support the array substrate 12 and the color film
substrate 11, such that a space is formed between the array
substrate 12 and the color film substrate 11. The liquid crystal
molecules 131 are located in the space formed with the support of
photo pacers 1151.
[0100] Further, as shown in FIG. 14, the array substrate 12 has one
side facing toward the color film substrate 11, and an opposing
side dicing away from the color film substrate 11. A polarizer
plate 14 is provided over the opposing side of the array substrate
12 dicing away from the color film substrate 11. A polarization
direction of the polarizer plate 14 may be perpendicular to a
polarization direction of the polarizer layer 114, such that light
can be emitted out from the display device 1.
[0101] In embodiments of the present disclosure, the array
substrate 12 may include thin film transistors (TFTs) (not shown in
FIG. 14) and pixel electrodes (not shown in FIG. 14). By applying
voltage signals to the pixel electrodes through the TFTs and
voltage signals to the functional composite layer 112 of the color
film substrate 12 simultaneously, voltage differences may be formed
between the array substrate 12 and the color film substrate 12. The
liquid crystal molecules 131 in the liquid crystal layer 13 may
rotate under influences of the voltage differences.
[0102] The display device 1 can be, for example, a mobile phone, a
tablet computer, a television, a monitor, a notebook computer, a
digital photo frame, a navigating instrument, or any other suitable
product or component having a display function. Any display device
including a color film substrate consistent with the disclosure is
within the scope of the present disclosure.
[0103] FIG. 13 illustrates a schematic view showing an operation of
an exemplary display device according to various disclosed
embodiments of the present disclosure. As shown in FIG. 15, white
light enters the display device from a side corresponding to the
array substrate 12. The white light can transmit through the liquid
crystal layer 13 and enter the color film substrate due to the
rotation of the liquid crystal molecules 131, and finally can be
emitted out from the display device through the color film
substrate. When the white light is passing through the color film
substrate, the red conductive unit of the functional composite
layer can convert the white light into red light, the green
conductive unit of the functional composite layer can convert the
white light into green light, and the blue conductive unit can
convert the white light into blue light, such that the display
device 1 can display a color image.
[0104] The array substrate 12 may include components similar to
those of the array substrate 81 shown in FIG. 1, and thus detailed
description thereof is omitted.
[0105] The present disclosure provides a display device. The color
film substrate in the display device of the disclosure may include
a functional composite layer which is electrically conductive and
configured to convert white light into color light. Thus, the
functional composite layer may serve as a color filter layer and a
common electrode. That is, the function of the color filter layer
and the function of the common electrode can be realized by the
functional composite layer. Accordingly, the color film substrate
in the display device of the disclosure may have a relatively small
number of layers, as compared to the conventional technologies in
which a color film substrate may have a relatively large thickness
and it may be hard to achieve a thin and light-weight device. The
color film substrate in the display device of the disclosure may
have a relatively small thickness, facilitating the realization of
a thin and light-weight display device.
[0106] In the display device of the present disclosure, the
polarizer layer may be provided over the functional composite layer
of the color film substrate. Further, the polarizer layer may be
located in a liquid crystal box after the color film substrate and
the array substrate are paired to form a box. Thus, an embedded
polarizer layer may be realized, and the thickness of the display
device may be further reduced.
[0107] The present disclosure provides a color film substrate, a
fabrication method thereof and a display device. The color film
substrate may include a substrate and a functional composite layer
arranged over the substrate. The functional composite layer can be
electrically conductive and can convert white light into color
light. The functional composite layer may be formed by at least one
composite material. The composite material may include a quantum
dot and a graphene. The quantum dot may include, for example, at
least one of a red quantum dot, a green quantum dot, a blue quantum
dot, or another appropriate quantum dot. The present disclosure may
reduce a thickness of the color film substrate, and may facilitate
a reduced thickness and a reduced weight of the display device.
[0108] It will be understood by those of ordinary skill in the art
that, all or part of the steps of the embodiments described above
may be accomplished by hardware, or by means of programs which
instruct associated hardware. The programs in a computer readable
storage medium. The storage medium can be a read-only memory, a
magnetic disk, an optical disk, or another appropriate storage
medium.
[0109] The foregoing description of the embodiments of the
disclosure has been presented for purposes of illustration and
description. It is not intended to be exhaustive or to limit the
disclosure to the precise form or to exemplary embodiments
disclosed. Accordingly, the foregoing description should be
regarded as illustrative rather than restrictive. Obviously, many
modifications and variations will be apparent to persons skilled in
this art. The embodiments are chosen and described in order to
explain the principles of the technology, with various
modifications suitable to the particular use or implementation
contemplated. It is intended that the scope of the invention be
defined by the claims appended hereto in which all terms are meant
in their broadest reasonable sense unless otherwise indicated.
Therefore, the term "the disclosure," "the present disclosure," or
the like does not necessarily limit the claim scope to a specific
embodiment, and the reference to exemplary embodiments of the
disclosure does not imply a limitation on the invention, and no
such limitation is to be inferred. Moreover, the claims may refer
to "first," "second," etc., followed by a noun or element. Such
terms should be understood as a nomenclature and should not be
construed as giving the limitation on the number of the elements
modified by such nomenclature unless specific number has been
given. Any advantages and benefits described may or may not apply
to all embodiments of the disclosure. It should be appreciated that
variations may be made to the embodiments described by persons
dolled in the art without departing from the scope of the present
disclosure. Moreover, no element or component in the presort
disclosure is intended to be dedicated to the public regardless of
whether the element or component is explicitly recited in the
following claims.
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